Malicious PDF — malware analysis report

Static analysis result for SHA-256 feacf5eab8ef2b4f…

MALICIOUS

PDF

85.5 KB Created: 2021-09-18 14:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac009f14f97b0c14f994f057f1000ab1 SHA-1: b9a6b83d63d1d2ca8fc1093af6a8ae2f5ae0b1b4 SHA-256: feacf5eab8ef2b4f9571fc0c0d016350bec8729fd927df72d1bc6e7f7dc2b33e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with compromised content management systems or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=is+redmi+note+10+5g+compatible PDF link annotation
    • https://mygenius.ru/admin/ckfinder/userfiles/files/33920160080.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/83057046535.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/vedixabe.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/110343097879.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/sedaburodakiliwulodal.pdfIn PDF document text
    • http://sport-zavora.cz/data/file/62572537041.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/84000569244.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/1029133461.pdfIn PDF document text
    • https://jotelek.hu/files/file/17576084285.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/707388736.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/tuxuro.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/famebazoletisi.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/pawopezozik.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/aace94ffcb15515d352fee620228fd59/95426706907.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce46583a0---72252073631.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/b970a54dc80740c1ea016f20692991e4/webide.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/robatilelevoperulod.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/panano.pdfIn PDF document text
    • http://jfe.hk/userfiles/newelurulukumaruwefori.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/vivepekokuxulo.pdfIn PDF document text
    • http://venkateshservices.com/uploads/36029392789.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/7630585304.pdfIn PDF document text
    • http://acril.ru/ufiles/files/vumipekobagipofaro.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 20208 bytes
SHA-256: 97da26b15d7d504b8199e13e49eea2fca0f495e0601eafaef4887d80203261fd
font_01_sfnt_off00011690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA7 11256 bytes
SHA-256: 6b659e31d5f897464bff8185b84897c084185430a6e43ebc70ab28a1c00c98f5